Free Printable Logaritmi

1.

Utilizând proprietățile logaritmilor, alegeți varianta corectă:

a)

$\log_215=\log_23+\log_25$

b)

$\log_215=\log_23-\log_25$

c)

$\log_215=\log_23\div\log_25$

2.

daca $\log_ab=x$

cat este $\log_ba$

a)

1-x

b)

2x

c)

$x^2$

d)

$\frac{1}{x}$

3.

care este formula de schimbare a bazei logaritmilor, unde $a>0;\ a\ne1;\ b>0;\ b\ne1$ ?

a)

$\log_ax=\frac{1}{\log_bx}$

b)

$\log_ax=\frac{\log_ba}{\log_bx}$

c)

$\log_ax=\frac{\log_bx}{\log_ba}$

4.

daca $\log_3x>\log_34$ , carui interval apartine x?

a)

$\left(-\infty;-4\right)$

b)

$\left(-\infty;+\infty\right)$

c)

$\left(-4;+4\right)$

d)

$\left(4;+\infty\right)$

5.

$n\times\log_ax\ne\log_ax^n$ $x>0\ ;\ n\epsilon R$

a)

Adevarat

b)

Fals

6.

$\log_25+\log_2\left(\frac{4}{5}\right)=?$

a)

$\log_2\left(5\times\frac{4}{5}\right)$

b)

$\log_24$

c)

2

d)

1

7.

logaritmul este operația inversă a ridicării la putere

a)

Adevarat

b)

Fals

8.

cum se citeste $\log_ay$ ?

(a)

9.

$\log_ax+\log_ay=?$ $x,y>0$

a)

$\log_axy$

b)

$\log_a\left(\frac{x}{y}\right)$

10.

$\log_a1=0$ , $unde\ a>0\ si\ a\ne1$

a)

Adevarat

b)

Fals

Logaritmi

Total questions: 10

Worksheet time: 6mins

Similar Resources on Wayground